Open Source Geospatial & Hydro-GIS tools

QGIS plugin for exploring mesh model results — animate TUFLOW, Telemac and HEC-RAS 2D outputs in the GIS.

Four decades of geospatial engineering — r.watershed and the most battle-tested hydrology modules in GIS.

The free, open-source GIS that has become the default spatial platform for water engineers worldwide.

The QGIS interface for SWAT+ — delineate, discretise and build a watershed model without leaving the GIS.

High-performance DEM conditioning — Priority-Flood depression filling at scale, C++ with Python bindings.

The geomorphometry powerhouse — hundreds of terrain and hydrology modules behind a free desktop GIS.

Utah State's parallel terrain-analysis suite — D-infinity flow modelling and objective stream-network extraction.

500+ fast geospatial analysis tools with the best DEM hydrology toolkit in open source.

Fast global watershed delineation in Python — the MERIT-Hydro engine behind the Global Watersheds web app.

Python + Google Earth Engine without the pain — interactive mapping and analysis of petabyte-scale water data.

Watershed delineation in pure Python — DEM conditioning to catchment boundary in a dozen lines.